Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and September 25, 2026.
Grafton, Wisconsin, in Ozaukee County, has about 13,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Grafton is held at the county jail, run by the Ozaukee County Sheriff's Office, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Grafton public records, Ozaukee County inmate search, Grafton arrest records, Grafton warrants, Grafton criminal records, Grafton court records, Wisconsin arrest records and Wisconsin inmate search.
Finding Someone in Custody in Grafton
A person kept in custody after an arrest in Grafton is held at the county jail, run by the Ozaukee County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Ozaukee County Sheriff's Office at ozaukeecounty.gov/165/Sheriff (page title: Ozaukee County Sheriff's Office | Ozaukee County, WI), phone (262) 284-7172, 1201 S Spring St Port Washington WI 53074-0245, Monday - Friday 8am - 5pm, which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster, so a search for a particular person goes through the office at (262) 284-7172.
The Ozaukee County Jail by the Numbers
On an average day in 2025 the jail held about 210 people, up from about 200 in 2019. Its rated capacity in 2025 was 262 beds, and it ran at 79 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Ozaukee County has about 94,000 residents (2024 Census Bureau estimate), so the jail holds about 22 people for every 10,000 residents.
Who Books People Into the Ozaukee County Jail
The Ozaukee County Sheriff's Office and the agency that reports for Grafton (filed by the FBI as Grafton Police Department) make the arrests that end in a booking in and around Grafton.
The Bayside Police Department and the Newburg Police Department are each listed by the FBI across several counties including Ozaukee County, so their arrests are not broken out for Ozaukee County here.
The largest arrest counts reported to the FBI were the Ozaukee County Sheriff's Office's 572 for 2025, Port Washington's 333 for 2025 and Mequon's 258 for 2025.
Together, the seven agencies in Ozaukee County with all twelve months of 2025 on file reported 1,634 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Grafton arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Ozaukee County serves the sentence in a facility of the Wisconsin Department of Corrections, whose inmate locator is at appsdoc.wi.gov/lop/welcome.
Frequently Asked Questions
How do I find an inmate in Grafton?
Ask the Ozaukee County Sheriff's Office at (262) 284-7172; its jail page SearchSystems verified is at ozaukeecounty.gov/165/Sheriff.
How many people are in the Ozaukee County jail?
About 210 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 262 beds.
What is the phone number for the Ozaukee County jail?
(262) 284-7172, the number on the page of the Ozaukee County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Ozaukee County go?
To a facility of the Wisconsin Department of Corrections; its inmate locator is at appsdoc.wi.gov/lop/welcome.
Is this the official Grafton website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.